Improvement in escapements



W. N. MANNING.

Clock Escapement.

No. 38,594. Patented May 195 1863.

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UNITED STATES PATENT OEEIcE.

WILLIAM -N. MANNING, OF ROOKPORT, MASSACHUSETTS.

IMPROVEMENT IN ESCAPEMENTS.

Specification forming part of Letters Patent No. 38,594, dated May 19, 1863; antedated February 28, 1862.

T0 aZZ whom, it may concern.-

Be it known that I, WILLIAM N. MANNING, of Rockport, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement in Escapements for Time- Keepers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a back view of a marine clock with my invention applied. Fig. 2 is a vertical section of the same. Fig. 3 is a horizontal section of the same. Fig. ":l: is an elevation of the escapement. Fig. 5 is a plan of one of the pallet-disks.

Similar letters of reference indicate corresponding parts in the several figures.

My invention relates to that class of escapement in which the escape-wheel gives impulse to the balance without the intervention of a lever. Its novelty consists in an improved system of pallets, attached to and oscillating with a balance-staff, arranged perpendicularly to the axis of the escape-wheel, just beyond the circle described by the points of the teeth of the said wheel, but within the planes of the revolution of the said teeth, by which system and arrangement some important advantages are obtained, as hereinafter explained.

To enable others skilled in the art to make and apply my invent-ion, I will proceed to describe its construction and operation.

A is the escape-wheel, of substantially similar construction to that in common use with the levcr-escapement, and a is its spindle. B is the balance, and b its staff, the latter arranged perpendicularly to the axis of the escape-wheel, just outside of the circle described by the points of the teeth thereof and directly opposite to said points. 0 O are two steel disks, with oblique notches c c in their peripheries, secured upon the balance-staff b. The faces 6 6 of the two notches c c constitute the pallets upon which the teeth (Z d of the escape-wheel act to give impulse to the balance, the obliquity of the said faces being in opposite directions, as illustrated by Fig. 4, and the faces of the other portions of the disks being perpendicular to the axis of the balance. The diameter of the disks is such that their peripheries will just clear the bottoms of the spaces between the teeth of the escape-wheel, and they are arranged opposite or nearly opposite the center of the escapewheel in such positions that the distance between their two upper faces is just equal to half the distance between the points of the teeth of the escape-wheel.

The operation of the escapement may be described as follows: Every tooth of the escapewheel acts first upon the oblique pallet 6 of the upper disk, 0, to drive the balance in one direction, and afterward on the corresponding pallet 6 of the lower disk, 0, to drive the balance in the opposite direction, passing through the notch c or c in either case. After its action on the upper pallet the escape-wheel is stopped and locked by the tooth which has just acted, dropping onto the plane upper surface of the lower disk, G and after its action on the lower pallet the said wheel is stopped by its next tooth dropping onto the plane upper surface of the upper disk, 0. The wheel remains locked while the balance completes its vibration, and until, in its returning movement, under the influence of the hair-spring, the notch c or c of the disk 0 or (J arrives opposite to the locked tooth and permitsthe said tooth to act upon the pallet of the said disk.

This escapeinent has few parts and is of very simple construction, the points of the escape-wheel teeth being locked very near the staff of the balance, where there is very little motion.

The escapement works in its locked condition with very little friction compared with the amount of power or impulse transmitted to the balance, such power or impulse being given at the points of the pallets, which terminate in the outer peripheries of their respective disks, and being taken from those parts of the teeth of the escape-wheel nearest the axis thereof.

What I claim as my invention, and desire to secure by Letters Patent, is

The employment of the oblique notched disks 0 G, in combination with each other and with the balance-wheel staft'b and escapewheel A, in the manner and for the purpose herein shown and described.

WM. N. MANNING.

Witnesses:

J AMES MANNING, ARTEMAS Gorr. 

